Latest notes, articles, and news
Question: Calling CkXmlDSigGen.SetX509Cert causes Windows to show a dialog box requesting validation. Is it possible to avoid the dialog box? Answer: Yes. The reason for displaying the dialog box is because the cert + private key was imported with the option to enable strong private key protection. Here’s a screenshot of the Window Certificate Import Wizard showing the two checkboxes: […]
This is a note about the pitfalls of progress monitoring HTTP requests sent from an installed app (i.e. not web app running in a browser). Ideally, we’d like to know how long an HTTP POST is going to take, and update the percent-completed visually so that when it reaches 100% the operation is neatly finished as indicated. This turns out […]
I like this article for the purpose of conceptually understanding the architecture for monitoring the progress of an HTTP web request in a Browser: https://buildwithdjango.com/blog/post/celery-progress-bars/ Regardless of technology, programming language, etc., it boils down to this: The initial HTTP request kicks off the work/job. Some infrastructure on the server-side starts the work in a background thread (or whatever) and returns […]
Chilkat’s Online XML Signature Validator: http://tools.chilkat.io/xmlDsigVerify.cshtml gob.es FacturaE online validator: http://sedeaplicaciones2.minetur.gob.es/FacturaE/ ETSI Signature Conformance Checker (requires credentials) http://signatures-conformance-checker.etsi.org Validate UBL: https://www.moj-eracun.hr/exchange/validateubl UBL 2.1 e-Invoice Validation: https://joinup.ec.europa.eu/solution/ubl-21-e-invoice-validation-service/about FatturaPA (fatturapa.gov.it) http://sdi.fatturapa.gov.it/SdI2FatturaPAWeb/AccediAlServizioAction.do?pagina=controlla_fattura ADSS Signing Server: https://account.ascertia.com/demos/xmlsignatureverificationstep1 apis.gometa.org hacienda (Costa Rica) XML Validator: https://apis.gometa.org/validar/ RTR Signatur-Prüfung https://www.signatur.rtr.at/de/vd/Pruefung.html ICP-Brasil https://verificador.iti.gov.br/verifier-2.6.2/ Weryfikacja Podpisu Elektronicznego https://weryfikacjapodpisu.pl/index.html XmlValidation.com: https://www.xmlvalidation.com/ I don’t trust this validator. Change the signed XML document to deliberately introduce errors and […]
Chilkat has resolved problems relating to the creation of XAdES-BES XML signatures for documents sent to www.csioz.gov.pl. These fixes will be available starting in Chilkat v9.5.0.76. At the time of this post (31-Oct-2018) 9.5.0.76 is not yet released. Contact support@chilkatsoft.com for a pre-release if desired. Chilkat has worked with a customer to successfully sign XML files having the HL7 […]
The bytes of a binary file, such as a JPG, PDF, etc. should never be treated as a string. Loading a binary file into a string, and then saving back to a binary file will surely result in a different file that is corrupted. This rule should be followed for all programming languages. Don’t treat binary non-text bytes as […]
This post shows the general technique to get the object returned by a method when it is called asynchronously. For example, consider the Mailman.GetUidls() method. A synchronous call to GetUidls returns a StringArray object, as shown here: However, the async version of the method, GetUidlsAsync, returns a Task object. The TaskCompleted callback is called when finished. The following code […]
This post clarifies the topic of binary vs. ascii uploads/downloads for SFTP (Secure File Transfer over SSH) and FTP. Binary mode transmits bytes exactly as-is. Text mode (also known as “ascii” mode) can modify line endings (CR’s and LF’s) to the canonical convention used on the remote system. For example, Linux systems typically use bare LF line-endings, whereas text […]
Question: Have you ever worked with Avalara Tax Software? I need to write an interface between our application and Avalara. Do you know if I could use the Chilkat REST API to write the interface? Answer: Yes, you can use Chilkat REST to call any REST API. A good way to go about it is to see if the […]
This post describes two problems and solutions for Amazon S3 that were recently encountered: (1) A Chilkat user found that the 1st HTTP request had a delay of 5 seconds, and then subsequent requests had no delay. Here’s what was found (reproduced with permission from the Chilkat user): I thought you might be interested to know that the long lookup […]